Sectra Tiger’s official website shows that government officials can use three such security phones, all of which have been specifically designed to stop cyber attacks. Which, Tiger/R looks like a smartphone, which is based on Samsung’s own Android smartphone development, equipped with a limited level of secure voice and text features and hardware-based encryption, which can prevent eavesdropping and greatly reduce malicious applications and Tampering loopholes. Sectra Tiger / R enhances organizational flexibility and agility because once the political turmoil and social dynamics occur, users can act quickly and without any risk of tapping.
On the other hand, the Tiger/S 7401 looks more like an old-school Nokia handset, and it has been developed to withstand attacks from any source. This model complies with the Netherlands and the European Union’s cryptographic classification and is awaiting approval by the NATO Secretariat.
Reference: Softpedia